2-hydroxy-5-lower alkyl-4&#39;(4-lower alkoxy-6-sulpho or sulphato-hydrocarbylamino-1:3:5-triazine-2-lamino)-azobenzene

ABSTRACT

IN WHICH R1 represents an alkyl radical, R2 represents hydrogen or alkyl, R3 represents an alkyl, aryl or aralkyl radical, X represents an alkylene, aralkylene or arylene radical, Y represents a direct bond or -0-, N REPRESENTS 0 OR 1 AND THEIR USE FOR DYEING NATURAL AND SYNTHETIC FIBRE MATERIALS, ESPECIALLY FOR DYEING POLYAMIDE FIBRES. Dyeings obtained show very good fastness to light.   Monoazo dyestuffs which in the form of the free acid correspond to the general formula

United States Patent [1'91 Siege] 1 Oct. 22, 1974 Z-HYDROXY-S-LOWER ALKYL-4 4-LOW ER ALKOXY-6-SULPHO OR SULPHATO-HYDROCARBYLAMJNO-l :3:5- TRIAZINE-Z-YLAMINO l-AZOBENZENE [75] Inventor: Edgar Siegel,

Leverkusen-Steinbuchel, Germany [73] Assignee: Bayer Aktiengesellschaft,

Leverkusen, Germany [22] Filed: Jan. 18, 1972 [21] Appl. No.: 218,832

[30] Foreign Application Priority Data Jan. 18, 1971 Germany 2102174 [52] US. Cl. 260/153, 260/249.8 [51] Int. Cl C091) 43/16 [58] Field of Search 260/153 [56] References Cited UNITED STATES PATENTS 2945,021 7/1960 Fasciati et al 260/153 2,945,022 7/1960 Fasciati et a1 260/153 3,527,747 9/1970 Mangini et a1 260/153 3,658,783 4/1972 Knobloch et al. 260/153 FOREIGN PATENTS OR APPLICATIONS 825,377 12/1959 Great Britain 260/153 Primary Examiner-Lorraine A. Weinberger Assistant Examiner-C. F. Warren Attorney, Agent, or Firm-Plumley & Tyner 5 7 ABSTRACT Monoazo dyestuffs which in the form of the free acid correspond to the general formula in which 8 Claims, No Drawings Z-HYDROXY-S-LOWER ALKYL-4' [4-LOWER ALKOXY-G-SULPHO R. SULPHATO-HYDROCARBYLAMINO-1:3:5- TRIAZINE Z-YLAMINO]AZOBENZENE The subject of the present invention are new triazinylamino-monoazo dyestuffs which in the form of the free acid correspond to the general formula as well as their manufacture and use for dyeing synthetic fibre materials, especially fibre materials of polyamides.

In the general formula (I),

R, represents an alkyl radical,

R represents hydrogen or an alkyl radical,

R,, represents an alkyl, aryl or aralkyl radical,

X represents an alkylene, aralkylene or arylene radical,

Y represents a direct bond or 'O and n represents 0 or 1.

The radicals R,, R R and X can optionally possess non-ionic substituents, for example halogen, such as chlorine and bromine, hydroxyl and alkoxy, especially C, C,-alkoxy.

Preferred alkyl radicals R, are those with 1-4 C atoms, such as methyl, ethyl, nand i-propyl and n-, iand tert=butyl radicals. These can be substituted, for example by hydroxyl, methoxy or ethoxy groups or by halogen, such as chlorine or bromine.

Preferred alkyl radicals R are those with 1-4 C atoms. As examples there may be mentioned: -CH;,, C H C;,H and --C,l-l,,. Particularly suitable alkyl radicals R,, are those with 1-4 C atoms, for example methyl, ethyl, n-propyl and tert.-butyl radicals. These can, for example, be substituted by hydroxyl or methoxy groups or by halogen, such as chlorine or bromine.

-CH2-CH2- -ca CH 4:11

Suitable aralkylene radicals X are, for example:

CH-CH and suitable arylene radicals are, for example:

are of general formula.

wherein R, has the meaning indicated in the formula (1), R,, represents hydrogen or C,C,-alkyl, R,, denotes a C,C,-al-kyl radical, X represents an ethylene radical in which case n O or I, or X represents a phenylene or benzylene radical, in

which case n O. The new dyestuffs of the general formula (I) can be manufactured according to various processes.

One process is that, successively and in optional sequence, 1 mol of a cyanuric halide is reacted with a. 1 mol of an alcohol R,OH

b. 1 mol of an amino R NHX(O),, SO,,H and c. 1 mol of an aminoazo dyestuff of the formula i III wherein R,, R R,,, X and Y have the meaning indicated in the formula I,

in the presence of acid-binding agents. In this process it is advantageous if the cyanuric halide is reacted in -CH H-,

the sequence (a) (c) (b) with the reactants mentioned.

A further process is characterised in that amines of the general formula N s -o-p c-HN--NH ll a lv N-R2 l x-(o) -so a in which R,, R X and n have the abovementioned meaning,

are diazotised and coupled with phenols of the formula in which R and Y have the abovementioned meaning.

Cyanuric chloride is preferably used as the cyanuric halide.

Suitable alcohols R OH are, for example: methyl alcohol, ethyl alcohol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, i-butyl alcohol, t-butyl alcohol, ethylene glycol, 2-methoxy-ethanol, Z-ethoxy-ethanol and 2-chloroethanol.

Suitable amines R NHX(O),,SO H are, for example: 2-amino-ethanesulphonic acid, 2-methylamino-ethanesulphonic acid, 2'butylaminoethanesulphonic acid, 3-amino-propanesulphonic acid,

3-amino-2-hydroxy-propanesulphonic acid, 3- methylamino-propanesulphonic V acid, 3 -ethylamino-propanesulphonic acid, 4-aminophenol, 4-ethyl-phenol, 4-i-propyl-phenol, 4-n-butylphenol, 4-i-hutyl-phenol, 4-t-butyl-phenol, 4-(2- hydroxyethyl)-phenol, 4-methoxy-phenol, 4-phenoxyphenol, 4-benzyl-phenol, 4-(2-phenylethyl-phenol and 4-hydroxy-diphenyl.

The dyestuffs of the formula (l) with n l and X alltylene can be manufactured particularly effectively if amines of the formula wherein R has the abovementioned meaning -4 are employed and, in the dyestuffs thus obtained, of the formula 3 X-OH wherein R,, R R and Y have the meaning indicated in the formula (I) and X represents alkylene, the aliphatic hydroxyl group is esterified with sulphuric acid.

Suitable amines of the formula (VI) are, for example: ethanolamine, N-methyl-ethanolamine, N-ethylethanolamine. 3-amino-l-propanol, 3-n-methylamin0- l-propanol, l -amino-2-propanol, 4-aminol -butanol and 4-N-methy1aminol -butanol.

The dyestuffs according to the invention are suitable for dyeing natural and synthetic fibre materials, especially for dyeing polyamide fibres in level, strong, yellow shades of very good fastness to light. They are well absorbed on polyamide fibres even in a neutral to weakly acid dyebath. By polyamide fibres there are here especially understood those of synthetic polyamides, such as -polycaprolactam or condensation products of adipic acid and hexamethylenediamine. Example 1 20.5 parts of cyanuric chloride are added, at 8, to a mixture of 75.6 parts of methyl alcohol and 18.9 parts of sodium bicarbonate and this suspension is stirred for 5 hours at 8l0. Thereafter, 62 parts of water and a solution of 22.7 parts of 4-amino-2-hydroxy-5-methyl- 1,1 '-azobenzene in 150 parts of methyl alcohol are added to this mixture. After stirring for a further hour at 2530, 36.8 parts of sodium 2-aminoethanesulphonate dissolved in 100 parts of water are added, the mixture is warmed to the boil (65) and heated for 1 hour under reflux, and the methyl alcohol is subsequently distilled off, The dyestuff of the formula:

1 N OH s c-0-o \C-HN-Q -N=N- I ll I N i I CH3 NH-CH -CH -SO H composition The meaning of R R and R is shown in the appropriately marked columns of the table.

Example No. l

Exam- I ple No. 1 2 3 '75 NH-CH CH CH -O-SO H II i 74 NH CH CH 30 1i CH CH .75 N 5 r n CH -Cd -O-SO H OH. 76 -N 5 -CH CH CH -CH -so,H

Example 78 I I N M k i O E 35.4 parts of 2-(4'-aminophenyl)-amino-4-methoxy- H C O C'% 6-(N-methyl-N-B-sulphoethyl)-amino-s-triazine (man- 5 l H i ufactured from methoxy-dichloro-s-triazine by reaction N N with N-methyl-taurine and N-acetyl-p- \C/ CH phenylenediamine, with subsequent saponification of i 3 the acetylamino group) are dissolved in 200 parts of 5 water at pH 7.7.0 parts of sodium nitrite are added and CH H after cooling to 5 30 parts of hydrochloric acid (37 2 2 5 li iiiiiiifi i 1 ai o i 'lilfiiiFSEZZJESZJE 5 1% F ij "i po yaml e a rics rom a wea y act or neutra at a of to l t. parts of sodium hydroxide and 300 parts of water at 5, claim; whilst stirring well. When the coupling is complete, the L Mohoazo d t ff Which in the f f the f Yellow dyestuff of the formula acid, corresponds to the formula 6H 40 N 1 HO H C-OC C-HN- -N=N- N I ll roof WNHN=N N N 1 \\\C// N a I OH 5 1 N/ 5 N--R2 CH CH -SO H o so3H which has reci itated almost com letel is filtered off inwihilfifi W W7 W7 H "WW" 7 and dried 5t It dyes polyamidtffibre s and polyam- 50 R1 rFpresems alkyl with l to 4 carbon atoms or alkyl ide fabrics from a weakly acid or neutral bath to give t gi i g ggg i sg gf r by hydroxyl clear yellow shades of very good fastness to l ght. 2 represents y g or alkyl with l to 4 carbon Example 79 atoms;

The condensation of methyl alcohol and 4-amino-2'- R3 repmsems alkyl wlth to 4 carbon atoms; hydmxy 5, methyl l1 azobenzene with cyanuric X represents alkylene with l to 4 carbon atoms and chloride in stages 1 and 2 is carried out as described in n denotes O or 1 Example 1. ln stage 3, 18.7 parts of N- methylethanolamine are added, the mixture is heated Monoazo i g vhlch the form of the free to the boil and boiled for 1 hour under reflux, and correspon S to t e Ormu a the methyl alcohol is subsequently distilled off. The e HO dyestuff which precipitates is filtered off, washed with water and well dried. Thereafter the yellow dyestuff is introduced into parts of sulphuric acid (96 percent 65 l T strength) and dissolved whilst stirring. After stirring for N N a a further 4 hours at 25C, the solution is poured out onto ice water and the dyestuff which precipitates, of

the formula in which R, represents methyl, ethyl, propyl, butyl or methoxy ethyl,

R represents hydrogen, methyl, ethyl, propyl or bu- 4. Monoazo dyestuff of the formula 5. Monoazo dyestuff f the formula '7 M onoaz o dyestuff of the formula '7 8; Monoazo dyestuff of the forrmfit 

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